Synthesis of DiamidoPyrrolyl Molybdenum Complexes Relevant to Reduction of Dinitrogen to Ammonia
作者:J. M. Chin、R. R. Schrock、P. Müller
DOI:10.1021/ic100856n
日期:2010.9.6
[(Art-BuN)2Pyr]Mo−N═NH is a key intermediate in the proposed catalytic reduction of dinitrogen that could not be prepared. Dinitrogen exchange studies in [(Art-BuN)2Pyr]Mo(N2) suggest that steric hindrance by the ligand may be insufficient to protect decomposition of [(Art-BuN)2Pyr]Mo−N═NH through a variety of pathways. Three attempts to reduce dinitrogen catalytically with [(Art-BuN)2Pyr]Mo(N) as a “catalyst” yielded
通过钼配合物催化还原二氮的潜在有用的三阴离子配体是其中 [(RNCH 2 CH 2 ) 3 N] 3-配体中的一个臂被 2-甲基吡咯基-α-甲基臂取代,即,[(RNCH 2 CH 2 ) 2 NCH 2 (2-MesitylPyrrolyl)] 3− (R = C 6 F 5 , 3,5-Me 2 C 6 H 3 , or 3,5- t -Bu 2 C 6 H 3 )。已制备出含有配体的化合物,其中 R = C6 F 5 ([C 6 F 5 N) 2 Pyr] 3- );它们包括 [(C 6 F 5 N) 2 Pyr]Mo(NMe 2 )、[(C 6 F 5 N) 2 Pyr]MoCl、[(C 6 F 5 N) 2 Pyr]MoOTf 和 [(C 6 F 5 N) 2 Pyr]MoN。含有配体的化合物,其中 R = 3,5- t -Bu 2 C 6 H 3 ([Ar t -Bu N) 2 Pyr]3−